The summer Olympics begin in just over two weeks. The quadrennial event has continued to grow over the years, with more than 200 countries and 10,000 athletes competing in 2008. Here’s how participation has changed over time:

As the event continues to grow, women are being included at higher rates. The last time the Olympics were held in London, about 10 percent of participants were female. In 2008, they made up more than 40 percent. Here’s the trend over time: